Pool Care Do I need algaecide if I use shock? March 4, 2026 by Myaya | Leave a Comment You generally do not need algaecide if you use shock treatment correctly and consistently, as shocking a pool is designed to kill existing algae and prevent its return. However, algaecide can be a valuable preventative measure or a secondary treatment for stubborn algae blooms. Understanding Pool Shock and Algaecide Pool shock, also known as super-chlorination, […] Read more ยป